The radius of the base and the height of a solid r ight circular cylinder are in the ratio 2 3 and its volume is 1617 Cu cm Find the total surface a rea of the cylinder CBSE Mathematics

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## The radius of the base and the height of a solid r ight circular cylinder are in the ratio 2 : 3 and its volume is 1617 Cu. cm. Find the total surface a rea of the cylinder. CBSE Mathematics

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radius(r)/height(h) = 2/3 , Volume = pie .r .r . h = 3/2 . pie . r^3 = 1617
r^3 = 343 , r = 7 , h = 10.5
Total Surface Area  =  2. pie . r (h+r) = 2.pie.7(17.5) = 770 cm^2

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